[MIPS] Print more information if we're struck by a machine check exception.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -819,15 +819,30 @@ asmlinkage void do_watch(struct pt_regs *regs)
 
 asmlinkage void do_mcheck(struct pt_regs *regs)
 {
+	const int field = 2 * sizeof(unsigned long);
+	int multi_match = regs->cp0_status & ST0_TS;
+
 	show_regs(regs);
-	dump_tlb_all();
+
+	if (multi_match) {
+		printk("Index   : %0x\n", read_c0_index());
+		printk("Pagemask: %0x\n", read_c0_pagemask());
+		printk("EntryHi : %0*lx\n", field, read_c0_entryhi());
+		printk("EntryLo0: %0*lx\n", field, read_c0_entrylo0());
+		printk("EntryLo1: %0*lx\n", field, read_c0_entrylo1());
+		printk("\n");
+		dump_tlb_all();
+	}
+
+	show_code((unsigned int *) regs->cp0_epc);
+
 	/*
 	 * Some chips may have other causes of machine check (e.g. SB1
 	 * graduation timer)
 	 */
 	panic("Caught Machine Check exception - %scaused by multiple "
 	      "matching entries in the TLB.",
-	      (regs->cp0_status & ST0_TS) ? "" : "not ");
+	      (multi_match) ? "" : "not ");
 }
 
 asmlinkage void do_mt(struct pt_regs *regs)